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Question: Carbon dioxide flows through a variable area duct. At a certain point in the duct the velocity is 200 m/s and the temperature is 60°C. At some other point in the duct, the temperature is 15°C. Find the Mach numbers and stagnation temperatures at the two points. Assume that the flow is adiabatic.
a how far from the center of the earth is the center of gravity of the earth-moon system? note the radius of the earth
A 238 kg cast-iron car engine contains water as a coolant. Suppose the engine's tempera- ture is 33C when it is shut off and the air temperature is 8C. What mass of water is used to cool the engine
A long rope is suspended from the ceiling. Waves are started from the bottom traveling up the rope. It is observed that their speed changes as they move up the rope. Do they get faster or slower? Explain why this occurs.
An athlete crosses a 28 m wide river by swimming perpendicular to the water current at a speed of 0.8 m/s relative to the water. What is the speed of the swimmer with respect to a friend at rest on the ground
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m..
A 124-kg balloon carrying a 22-kg basket is descending with a constant downward velocity of 18.5m/s. How high was the balloon when the rock was thrown out
Consider a cylindrical Dewar with an inner container 0.220m high and 0.090m in diameter used to store liquid helium at 4.22 K; at that temperature the heat of vaporization of helium is 2.09 × 104 J/kg. How much helium is lost per hour
A circular wire loop whose radius is 15.0 cm carries current of 2.50 A. What torque acts on the loop
A 5.66 kilogram object falls freely (neglect air resistance), after being dropped from rest. Compute the initial kinetic energy, the final kinetic energy, and the change in kinetic energy
A 2 kg mass passes through the origin (x=0) with initial velocity -3m/s to the left on a horizontal frictionless table, Find the values of x which the mass has zero acceleration
a 2.97-kg projectile is fired with an initial speed of 133 ms at an angle of 28deg with the horizontal. at the top of
A 0.200 kg block is placed on a vertical spring (k = 5.80x 10^3 N/m) and pushed downward, compressing the spring 0.100 m. As the block is released, it leaves the spring and continues to travel upward. What height above the point of release will bl..
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